@Sitting-Duc Can you make a Custom Dark theme please? They say it's easy to do on there web site lol
https://invisioncommunity.com/features/customization/
Even just flip flop the colors. White to black and black to white so the background is black and all the text is white.

If you have room for a dual 120mm AIO cooler I would go that route.
Newegg has a few H100i Pro RGB AIO coolers forsale on Ebay for $109.99 shipped to your door. https://www.ebay.com/itm/Corsair-Hydro-Series-H100i-PRO-Low-Noise-240mm-RGB-Water-Liquid-CPU-Cooler-240mm/382523712283?epid=4027048598&hash=item591030a31b:g:gnEAAOSwp-Fc01dq